code: def train_data():
      iris = load_iris()
      return iris.data, iris.target
  
file_path: lightning/lightning/impl/tests/conftest.py
imports: import pytest
  import scipy.sparse
  from sklearn.datasets import load_iris
  from lightning.impl.datasets.samples_generator import make_classification
label_desc: Use image node_id 1 for calling a global function with example usage: train_data() and returns: iris,  iris